back to a very healthy environment again because you've been in a hostile environment for so many hours. >> reporter: the heart-stopping return to earth could take 5 1/2 minutes. and after 25 years of skydiving, felix baumgartner promises this jump will be his last. >> last is probably a safe bet there. >>> that is what's making news this america this morning. >> stay with us for "good morning america." have a great tuesday. thanks for watching.